<template>
<div id="root">
  <div class="todo-container">
    <div class="todo-wrap">
      <MyHeader :addTodo="addTodo"/>
      <MyList :todos="todos" :checkTodo="checkTodo" :deleteTodo="deleteTodo"/>
      <MyFooter :todos="todos" :checkAllTodo="checkAllTodo" :clearAllTodo="clearAllTodo"/>
    </div>
  </div>
</div>
</template>

<script>
import MyHeader from './components/MyHeader.vue'
import MyList from './components/MyList.vue'
import MyFooter from './components/MyFooter.vue'
export default {
    name:'App',
    components:{MyHeader,MyList,MyFooter},
    data() {
  return {
    todos:JSON.parse(localStorage.getItem('todos'))||[]
  }
},
watch:{
  todos:{
    deep:true,
    handler(value){
      localStorage.setItem('todos',JSON.stringify(value));
    }
  }
},
methods:{
  addTodo(todoObj){
    this.todos.unshift(todoObj);
  },
  checkTodo(id){
    this.todos.forEach((todo)=>{
      if(todo.id===id) todo.done=!todo.done
    })
  },
  deleteTodo(id){
    this.todos=this.todos.filter((todo)=>{
      return todo.id!=id;
    })
  },
  checkAllTodo(done){
    this.todos.forEach((todo)=>{
      todo.done=done
    })
  },
  clearAllTodo(){
    this.todos=this.todos.filter((todo)=>{
      return !todo.done
    })
  }
}
}
</script>

<style>
/*base*/
body {
  background: #fff;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}
.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}


</style>

